MANTIS blog

Practical IHM guidance for maritime teams.

For vessel operators, DPAs, Chief Engineers, and technical managers keeping Part I current, supplier evidence controlled, and survey packs inspection-ready.

IHM maintenance

IHM Part I maintenance procedure

What vessel operators should track after IHM certification: Part I changes, MD/SDoC evidence, review cadence, and survey-ready records.

28 Jul 2026 · 7 min read

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Commercial vessel in shipyard maintenance with cranes and vessel equipment

Maintenance loop

Keep Part I current through refits and vessel changes

Offshore support vessel underway in coastal waters

IHM roles6 min read

The IHM Designated Person: role and responsibilities

What the IHM Designated Person does, how the role fits vessel teams, and how to keep Part I maintenance from drifting.

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Small commercial vessel hauled out for maintenance and refit work

Refit workflow8 min read

IHM and your refit: a briefing for DPs and Chief Engineers

How DPs and Chief Engineers should handle IHM Part I changes, MD/SDoC evidence, and documentation during a vessel refit.

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Large yacht deck and equipment detail with tender and helipad area

Chief Engineer workflow7 min read

Refrigerants, ODS, and your IHM

How ODS refrigerants affect IHM Part I, MARPOL Annex VI records, and Chief Engineer documentation after service work.

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Supplier evidence

Collect MD/SDoC/SDS evidence without losing the link to the vessel

Aerial view of cruise and passenger vessels alongside a port terminal

Supplier evidence6 min read

How to manage supplier MD/SDoC requests

A practical workflow for requesting MD and SDoC evidence from suppliers and keeping declarations attached to IHM Part I changes.

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Container vessels and cranes at a busy commercial port

MD and SDoC evidence7 min read

Material Declarations and SDoC: managing IHM evidence

What Material Declarations and SDoC are, when vessel teams need them, and how to keep supplier evidence attached to Part I changes.

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Software choice

Choose the right operating model for IHM maintenance

Large yacht underway near a rocky coastline

IHM software6 min read

IHM software for vessel operators

What vessel operators should expect from IHM software: Part I maintenance, supplier evidence, certificate tracking, audit trail, and exports.

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Large cruise ship underway at sunset

Fleet IHM software6 min read

IHM maintenance software for fleets

What fleet operators need from IHM maintenance software: consistent vessel records, supplier evidence, dates, audit trail, and exports.

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Large yacht stern view underway at sea

Software comparison6 min read

IHM software vs spreadsheets

Where spreadsheets break down for IHM maintenance, and when vessel operators should move Part I records and evidence into software.

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All IHM guides

IHM software buyer’s guide: seven capabilities that matter IHM Part I maintenance procedure IHM software for vessel operators IHM maintenance software for fleets IHM software vs spreadsheets How to manage supplier MD/SDoC requests Class tool vs independent IHM software ICIHM deadline for existing ships: what 26 June 2030 means The IHM Designated Person: role and responsibilities IHM Part I, II and III explained Material Declarations and SDoC: managing IHM evidence Does my vessel need an IHM? Scope, 500 GT, and EU port calls IHM and Port State Control: what inspectors check HKC and EU SRR IHM certificates: what applies in 2026?Refrigerants, ODS, and your IHM Before your IHM renewal survey: a preparation checklist IHM on older vessels: when the builder's records don't exist IHM and your refit: a briefing for DPs and Chief Engineers Hong Kong Convention and IHM: what changed